WHICH WATCH FITS

Casio G-SHOCK GMC-B2100D-1A Full Metal Chronograph

Casio · G-SHOCK

Casio G-SHOCK GMC-B2100D-1A Full Metal Chronograph

Casio G-SHOCK GMC-B2100D-1A Full Metal Chronograph (reference GMC-B2100D-1A) — specifications, measurements, watch images and standardized wrist-fit previews for informed comparison.

A premium full-metal 2100-series G-SHOCK combining analog chronograph styling, Tough Solar, Bluetooth and 200 m water resistance.

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Best forBuyers wanting G-SHOCK toughness with a premium full-metal analog chronograph design.
Not ideal forSmall wrists or buyers who prefer mechanical movements.

At a glance

ReferenceGMC-B2100D-1A
CollectionG-SHOCK
Model lineGMC-B2100
Production statusCurrent
Official size46.3 mm
Watch technology InfoTough Solar
DisplayAnalog
Movement InfoQuartz / Solar
Key features InfoChronograph, World time, Alarm, Bluetooth, Light-powered / solar charging
Complication InfoChronograph / dual time
Case diameter Info46.3 mm
Thickness Info12.4 mm
Lug-to-lug Info51.3 mm
Power reserve / runtime5 months normal use; 18 months with power saving after full charge
Water resistance200 m
OriginJapan
Price categoryNot available

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Strengths and considerations

Strengths

  • Full-metal construction
  • Tough Solar
  • Bluetooth
  • 200 m water resistance
  • Chronograph

Considerations

  • Large 46.3 mm case width
  • Heavy at 171 g
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Manufacturer and technical references used to verify this watch specification.

Specifications last verified: 2026-08-14.

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